Experimental investigation of two-phase flow patterns in minichannels at horizontal orientation

Experimental investigation of two-phase flow patterns in minichannels at horizontal orientation Two-phase flow is the simplest case of multiphase flow in which two phases are present for a pure component. The mini channel is considered as diameter below 3.0–0.2 mm and conventional channel is considered diameter above 3.0 mm. An experiment was conducted to study the adiabatic two-phase flow patterns in the circular test section with inner diameter of 1.1, 1.63, 2.0, 2.43 and 3.0 mm for horizontal orientation using air and water as a fluid. Different types of flow patterns found in the experiment. The parameters that affect most of these patterns and their transitions are channel size, phase superficial velocities (air and liquid) and surface tension. The superficial velocity of liquid and gas ranges from 0.01 to 66.70 and 0.01 to 3 m/s respectively. Two-phase flow pattern photos were recorded using a high speed CMOS camera. In this experiment different flow patterns were identified for different tube diameters that confirm the diameter effect on flow patterns in two-phase flows. Stratified flow was not observed for tube diameters less than 3.0 mm. Similarly, wavy-annular flow pattern was not observed in 1.6 and 1.0 mm diameter tubes due to the surface-tension effect and decrease in tube diameter. Buoyancy effects were clearly visible in 2.43 and 3.0 mm diameter tubes flow pattern. It has also observed that as the test-section diameter decreases the transition lines shift towards the higher gas and liquid velocity. However, the result of flow pattern lines in the present study has good agreement with the some of the existing flow patterns maps. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Heat and Mass Transfer Springer Journals

Experimental investigation of two-phase flow patterns in minichannels at horizontal orientation

Experimental investigation of two-phase flow patterns in minichannels at horizontal orientation

Heat Mass Transfer (2017) 53:2799–2811 DOI 10.1007/s00231-017-2020-9 ORIGINAL Experimental investigation of two‑phase flow patterns in minichannels at horizontal orientation 1 1 P. S. Saljoshi · A. T. Autee Received: 7 November 2016 / Accepted: 14 March 2017 / Published online: 27 March 2017 © Springer-Verlag Berlin Heidelberg 2017 Abstract Two-phase flow is the simplest case of mul - in the present study has good agreement with the some of tiphase flow in which two phases are present for a pure the existing flow patterns maps. component. The mini channel is considered as diameter below 3.0–0.2 mm and conventional channel is considered diameter above 3.0 mm. An experiment was conducted to 1 Introduction study the adiabatic two-phase flow patterns in the circular test section with inner diameter of 1.1, 1.63, 2.0, 2.43 and Two-phase flow is the simplest case of multiphase flow in 3.0 mm for horizontal orientation using air and water as a which two phases are present in pure component. The flow fluid. Different types of flow patterns found in the experi - within each phase or component will clearly depend on that ment. The parameters that affect most of these patterns and geometric distribution. An appropriate starting point is a their transitions are channel size, phase superficial veloci - phenomenological description of the geometric distributions ties (air and liquid) and surface tension. The superficial or flow patterns that are observed in common multiphase velocity of liquid and gas ranges from 0.01 to 66.70 and flows. This study describes the flow patterns observed in 0.01 to 3 m/s respectively. Two-phase flow pattern photos horizontal tubes and identifies a number of the instabili - were recorded using a high speed CMOS camera. In this ties that lead to transition from one flow pattern to another. experiment different flow patterns were identified for dif - A particular type of geometric distribution of the com- ferent tube...
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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2017 by Springer-Verlag Berlin Heidelberg
Subject
Engineering; Engineering Thermodynamics, Heat and Mass Transfer; Industrial Chemistry/Chemical Engineering; Thermodynamics
ISSN
0947-7411
eISSN
1432-1181
D.O.I.
10.1007/s00231-017-2020-9
Publisher site
See Article on Publisher Site

Abstract

Two-phase flow is the simplest case of multiphase flow in which two phases are present for a pure component. The mini channel is considered as diameter below 3.0–0.2 mm and conventional channel is considered diameter above 3.0 mm. An experiment was conducted to study the adiabatic two-phase flow patterns in the circular test section with inner diameter of 1.1, 1.63, 2.0, 2.43 and 3.0 mm for horizontal orientation using air and water as a fluid. Different types of flow patterns found in the experiment. The parameters that affect most of these patterns and their transitions are channel size, phase superficial velocities (air and liquid) and surface tension. The superficial velocity of liquid and gas ranges from 0.01 to 66.70 and 0.01 to 3 m/s respectively. Two-phase flow pattern photos were recorded using a high speed CMOS camera. In this experiment different flow patterns were identified for different tube diameters that confirm the diameter effect on flow patterns in two-phase flows. Stratified flow was not observed for tube diameters less than 3.0 mm. Similarly, wavy-annular flow pattern was not observed in 1.6 and 1.0 mm diameter tubes due to the surface-tension effect and decrease in tube diameter. Buoyancy effects were clearly visible in 2.43 and 3.0 mm diameter tubes flow pattern. It has also observed that as the test-section diameter decreases the transition lines shift towards the higher gas and liquid velocity. However, the result of flow pattern lines in the present study has good agreement with the some of the existing flow patterns maps.

Journal

Heat and Mass TransferSpringer Journals

Published: Mar 27, 2017

References

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